Mobile ad spending in Western Europe is expected to skyrocket within next few years, according to research firm eMarketer.

The mobile ad spending will exceed US$3.46 billion in 2011, from merely $454 million in 2006. The growth in Western Europe is nearly sevenfold.

Mobile multimedia ad spending is growing strongly in recent years - jumping from a niche $84 million in 2006 to $634 million in 2011, according to eMarketer.

On the other hand, general mobile ad spending is still steady – up from $370 million in 2006 to $2.83 billion in 2011, with an over 600 percent growth.